| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have been [v-ing] for a | 184 |
|
| 2 | it have been [v-ing] for | 50 |
|
| 3 | it have been for a | 12 |
|
| 4 | it have been [v-ing] a | 11 |
|
